Are rockers worth the money or just skip them? Not wanting to do a cam because I plan on turboing in the next couple year or two. Just looking for a little more until then.

 

here's the dyno results from installing the VHP 1.89 accelerated lift rocker kit. tq peak is misleading as there was a spike at the beginning of the before run.

 

They are not worth it.
1. With most 1.85 rockers you have to replace springs
2. Kits with springs cost as much as a cam kit, with springs and pushrods
3. A cam kit will give you around 35-40rwhp

I would save and buy a cam kit .

 

I wonder how much pre-load they get?

 

The VHP rockers there, Ben?

 

Yeah, I was curious. But I guess you sent me that, right?

 

Yeah, I was going to say those were the specs that VHP shoots for with their valvetrain mods...

 

We have documented increases of over 25hp and 24ftlbs torque with the installation of our VHP 1.8 accelerated lift roller rocker package. We have consistently received 15 to 18hp and 18 to 20ft lbs torque. There are some other important benefits from the VHP rocker package. The kit not only contains billet aluminum, super quiet accelerated lift 1.8 roller rockers, but also, stronger, lighter, chromoly pushrods, guide plates, screw in studs and poly locks. This allows the installer to properly adjust the lifter preload. There has been a lot of discussion about lifter preload of late. Some cam manufacturers and retailers are leading clients to believe there is a benefit to running very little preload. As little as .004 preload has been touted. This can cause premature valve spring failure, and power losses. Hydraulic roller camshafts do not have clearance ramps like solid roller camshafts. When an aluminum engine heats up, the rocker arms actually become looser and .004 lifter preload can become .002 lash (negative preload). The resulting noise causes knock sensors to remove timing from the spark curve and the power falls off significantly. The cure! We advise our clients to run .060 to .120 lifter preload. We have documented greater horsepower results and far less valve train wear than with lesser preload settings. To learn more about our rockers and cams, click here. http://www.vincihiperformance.com/LS...RTSPARENT.HTML

 

I forgot to mention the difference in throttle response. The new geometry provides increased airflow earlier in the lift cycle and maintains it longer into the closing event. More flow equals more power! The result is an instant increase in throttle response.

 

Joe, how well does your setup work with a magnacharger radix on an LQ4?